I recently learned that there is one wallet in the world with 1 million BTC attached. Who do you think it could be?
You need to get your facts straight, you are a newbie so we get it but it is important to look for this information by yourself, it is believed by some that satoshi does in fact posses 1 million bitcoins making him by far the biggest holder in the world.
There's no source to this assumption and might this theory is true or just a rumor. It might be Satoshi holds a Million of Bitcoins but not on a single wallet.
The good thing about Bitcoin is you can hide your wealth without knowing others, who knows if there's a Bitcoin address hold that big amount but I doubt it was a long time ago or the pioneer of Bitcoin.
Forget about it who held a huge amount of Bitcoin in a single wallet, that's none of our business. It's good if we accumulate our own and aim to store one million Bitcoin in just a single wallet and publicly reveal it.